Xing 4.0 vs Hy4 Preview
Xing 4.0 took 25 min 32 s and was free at list price, Hy4 Preview took 26 min 54 s and $0.26 at list price. Hy4 Preview took 1.1× as long.
Xing 4.0
XingChen · free route
Hy4 Preview
Tencent · $2.50/M out · 440 HN pts
Pelican
Generate an SVG of a pelican riding a bicycle
Watch
Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.
Landing
Build the landing page for Lumen Cycles, a Copenhagen workshop that builds custom cargo bikes to order. Make it look like a real brand you would trust with 4,000 euros.
Breakout
Make a Breakout game I can play right now with the keyboard or the mouse. Give it several levels, a score and some juice.
About
Write the opening of the About us page for Patchbay, a three-person studio in Rotterdam that repairs vintage synthesizers. About 150 words.
Patchbay is a compact, three-person workshop rooted in the dynamic streets of Rotterdam, born from a shared reverence for analog sound. Our team shares an unwavering dedication to vintage synthesizers, viewing each oscillator, filter, and routing cable as a vital piece of sonic history waiting to be restored. Whether diagnosing a failing voltage regulator or carefully retrofitting obsolete components, we take immense pride in bringing classic instruments back to their full potential. In our studio, repairing isn't just a technical service—it is a shared passion among friends who believe the past deserves to keep playing. We meticulously diagnose and revive legacy synths, ensuring the iconic sounds of yesterday continue shaping today’s electronic music. Bring us your dented, broken machines, and let us help you reconnect them with the rich, unmistakable sounds they were always meant to make. Every patch, every knob, every fleeting tone depends on the work we do here.
Patchbay is a three-person studio in Rotterdam with a very specific obsession: bringing vintage synthesizers back to life. We are three technicians and musicians who spend our days surrounded by circuit boards, calibration tapes, and the smell of solder, coaxing sound out of machines that have been silent for years. From wobbly oscillators and dead keys to crackling faders and drifting filters, we diagnose, repair, and restore analog instruments with the patience they deserve. Our workshop is stocked with rare spare parts, original service manuals, and a deep archive of hard-won knowledge about classics from Moog, Roland, Sequential, Korg, and ARP. We love these instruments not as museum pieces, but as living tools that still have music in them. Every synthesizer that leaves our bench is tested, played, and calibrated so it feels reliable enough for the stage, the studio, or the late-night jam that inspired it in the first place.
Specs and numbers
| Xing 4.0 | Hy4 Preview | |
|---|---|---|
| Maker | XingChen | Tencent |
| Made in | China | China |
| Released | 16 Oct 2026 | 28 Aug 2026 |
| Price in, per M tokens | free route (list $0/M) | $0.834 |
| Price out, per M tokens | free route (list $0/M) | $2.50 |
| Context | 262,144 tokens | 1,048,576 tokens |
| Weights | open | open |
| Hacker News points | — | 440 |
| Time for the five prompts | 25 min 32 s | 26 min 54 s |
| List price of the five prompts | free | $0.26 |
Xing 4.0 was free at list price; Hy4 Preview cost $0.26. Xing 4.0 was faster: 82 s less in total, and faster on 4 of the 5 prompts.
In the recording, Xing 4.0's Breakout game plays; Hy4 Preview's loads but doesn't start. Xing 4.0's landing page showed a blank first frame when the still was taken. Xing 4.0 has no logo: doesn’t draw (an SVG file without the SVG namespace, which browsers draw as an empty box).





